Jude Law dating model Alicia Rountree?

Sources tell Life & Style magazine the British actor and the Mauritius native have become “pretty serious really fast.”

Rountree, 25, who is a part owner of New York’s Tartinery restaurant, accompanied the 40-year-old actor to the French premiere of his film “Side Effects” on March 4.

(Photo by Marc Stamas/Getty Images)

The source adds, “She’s a nice girl and comes from a good family. She’s young, but mature. She’s been modeling for a long time so she had to grow up fast.”

Law previously dated actress Sienna Miller on and off for seven years, while he also briefly romanced model Samantha Burke – the mother of his 2-year-old daughter. The actor was married to Sadie Frost for six years. He and Frost have three kids.